What is the benefit of a web application firewall?

A.
It blocks known vulnerabilities without patching applications.

B.
It simplifies troubleshooting.

C.
It accelerates web traffic.

D.
It supports all networking protocols.

Explanation:
BD
A Web Application Firewall (or WAF) filters, monitors, and blocks HTTP traffic to and from a web application. A
WAF is differentiated from a regular firewall in that a WAF is able to filter the content of specific web
applications while regular firewalls serve as a safety gate between servers. By inspecting HTTP traffic, it can
prevent attacks stemming from web application security flaws, such as SQL injection, Cross-Site Scripting
(XSS) and security misconfigurations.
Source: https://en.wikipedia.org/wiki/Web_application_firewall